Inventor

LIU YAFEI

CN30 patents

⚠️ This page may combine multiple inventors who share the name “LIU YAFEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LIU YAFEI

BEIJING EASPRING MAT TECH CO LTD

Sodium-containing oxide positive electrode material and preparation method therefor and use thereof, and positive electrode plate and use thereof

Positive electrode material of lithium-ion battery and preparation method therefor

Positive electrode material for lithium ion battery and preparation method therefor, and lithium ion battery

Surface-coated positive electrode material and preparation method therefor, and lithium ion battery

Single crystal multi-element positive electrode material, preparation method therefor, and lithium ion battery

Lithium-manganese rich material, preparation method therefor and use thereof

Positive electrode material and preparation method and use therefor, lithium-ion battery positive electrode pole piece, and lithium-ion battery

Positive electrode material for lithium ion battery and preparation method therefor

Lithium-manganese-rich material, preparation method for same, and applications thereof

Positive electrode material having multi-cavity structure and preparation method therefor, and lithium ion battery

Positive electrode material, preparation method therefor, and application thereof

Lithium iron manganese phosphate precursor, lithium iron manganese phosphate positive electrode material and preparation method therefor, electrode material, electrode, and lithium-ion battery

Single-crystal-type multi-element positive electrode material, and preparation method therefor and application thereof

GUANGDONG MEIHONG DENTAL TECH CO LTD

Toothbrush head

Electric toothbrush

Electric toothbrush replacement head

GUANGDONG MEIHONG INDUSTRIAL TECH CO LTD

Electric toothbrush head

Electric toothbrush head

SHANGHAI YUSHANZHI INFORMATION TECH COMPANY LIMITED

Display screen of a wearable device with transitional graphical user interface

Display screen of a wearable device with a transitional graphical user interface

NINEBOT BEIJING TECH CO LTD

Delivery robot chassis

Set of wheels for a delivery robot chassis

MOBVOI INFORMATION TECH COMPANY LIMITED

Display screen of a wearable device with a transitional graphical user interface

SHI JIANJUN

Piston-type variable speed control device

UNIV SHIJIAZHUANG TIEDAO

Soil property test device

UNIV ZHEJIANG

Supercritical carbon dioxide state monitoring and control system based on infrared spectrum characteristic analysis

GUANGDONG YINGXIN TECH CO LTD

Toothbrush and toothbrush head

TENCENT TECH SHENZHEN CO LTD

Session message generation method, apparatus and storage medium and device

APPLIED BIOSYSTEMS LLC

Bisulfite conversion reagent

UNIV XIAN SHIYOU

Device and method for measuring magnitude of seepage force and its influence on effective stress of formation